from GUIComponent import GUIComponent
from enigma import eTimer

class ConditionalWidget(GUIComponent):
	def __init__(self, withTimer = True):
		GUIComponent.__init__(self)
		
		self.setConnect(None)
		
		if (withTimer):
			self.conditionCheckTimer = eTimer()
			self.conditionCheckTimer.callback.append(self.update)
			self.conditionCheckTimer.start(1000)

	def postWidgetCreate(self, instance):
		self.visible = 0

	def setConnect(self, conditionalFunction):
		self.conditionalFunction = conditionalFunction
		
	def activateCondition(self, condition):
		if condition:
			self.visible = 1
		else:
			self.visible = 0

	def update(self):
		if (self.conditionalFunction != None):
			try:
				self.activateCondition(self.conditionalFunction())
			except:
				self.conditionalFunction = None
				self.activateCondition(False)

class BlinkingWidget(GUIComponent):
	def __init__(self):
		GUIComponent.__init__(self)
		self.blinking = False
		self.setBlinkTime(500)
		self.timer = eTimer()
		self.timer.callback.append(self.blink)
	
	def setBlinkTime(self, time):
		self.blinktime = time
		
	def blink(self):
		if self.blinking == True:
			self.visible = not self.visible
			
	def startBlinking(self):
		self.blinking = True
		self.timer.start(self.blinktime)
		
	def stopBlinking(self):
		self.blinking = False
		if self.visible:
			self.hide()
		self.timer.stop()

class BlinkingWidgetConditional(BlinkingWidget, ConditionalWidget):
	def __init__(self):
		BlinkingWidget.__init__(self)
		ConditionalWidget.__init__(self)
		
	def activateCondition(self, condition):
		if (condition):
			if not self.blinking: # we are already blinking
				self.startBlinking()
		else:
			if self.blinking: # we are blinking
				self.stopBlinking()
